ORACLE_DBA管理脚本

SYS @ prod >col index_name for a10

SYS @ prod >col table_name for a10

SYS @ prod >col start_monitoring for a20

SYS @ prod >col end_monitoring for a20

SYS @ prod >set linesize 1000

SYS @ prod >set pagesize 1000

监控索引是否使用

SYS @ prod >create index ind_deptno on childen(deptno);

Index created.

SYS @ prod >select * from v$object_usage where index_name = &index_name;

Enter value for index_name: 'IND_DEPTNO'

old 1: select * from v$object_usage where index_name = &index_name

new 1: select * from v$object_usage where index_name = 'IND_DEPTNO'

INDEX_NAME TABLE_NAME MON USE START_MONITORING END_MONITORING

---------- ---------- --- --- -------------------- --------------------

IND_DEPTNO CHILDEN YES NO 06/09/2014 01:38:27

求数据文件的I/O分布

SYS @ prod >select df.name,phyrds,phywrts,phyblkrd,phyblkwrt,singleblkrds,readtim,writetim from v$filestat fs,v$dbfile df where fs.file#=df.file# order by df.name;

NAME PHYRDS PHYWRTS PHYBLKRD PHYBLKWRT SINGLEBLKRDS READTIM WRITETIM

-------------------------------------------------- ---------- ---------- ---------- ---------- ------------ ---------- ----------

/u01/app/oracle/oradata/prod/example01.dbf 6 1 6 1 3 8 0

/u01/app/oracle/oradata/prod/sysaux01.dbf 706 147 1588 195 483 444 3

/u01/app/oracle/oradata/prod/system01.dbf 4237 54 5164 65 4142 1344 8

/u01/app/oracle/oradata/prod/undotbs01.dbf 27 57 27 100 24 65 34

/u01/app/oracle/oradata/prod/users01.dbf 5 1 5 1 2 6 0

求系统中较大的latch

SYS @ prod >select name,sum(gets),sum(misses),sum(sleeps),sum(wait_time) from v$latch_children group by name having sum(gets) > 50 order by 2;

NAME SUM(GETS) SUM(MISSES) SUM(SLEEPS) SUM(WAIT_TIME)

-------------------------------------------------- ---------- ----------- ----------- --------------

client/application info 72 0 0 0

Shared B-Tree 79 0 0 0

channel handle pool latch 88 0 0 0

transaction allocation 116 0 0 0

In memory undo latch 120 0 0 0

OS process 219 0 0 0

parallel query alloc buffer 276 0 0 0

post/wait queue 291 0 0 0

library cache pin allocation 369 0 0 0

session idle bit 395 0 0 0

object queue header heap 507 0 0 0

library cache lock allocation 699 0 0 0

kks stats 1753 0 0 0

redo allocation 1840 0 0 0

undo global data 3610 0 0 0

channel operations parent latch 10662 0 0 0

object queue header operation 11613 0 0 0

cache buffers lru chain 11724 1 1 39

simulator lru latch 13895 0 0 0

checkpoint queue latch 14910 0 0 0

simulator hash latch 15304 0 0 0

library cache lock 36630 0 0 0

enqueue hash chains 47441 0 0 0

SQL memory manager workarea list latch 49156 0 0 0

library cache pin 82231 0 0 0

shared pool 103254 0 0 0

row cache objects 111045 0 0 0

library cache 133841 0 0 0

cache buffers chains 337148 0 0 0

求归档日志的切换频率(生产系统可能时间会很长)

SYS @ prod >select start_recid,start_time,end_recid,end_time,minutes from (select test.*, rownum as rn from (select b.recid start_recid,to_char(b.first_time,'yyyy-mm-dd hh24:mi:ss') start_time,a.recid end_recid,to_char(a.first_time,'yyyy-mm-dd hh24:mi:ss') end_time,round(((a.first_time-b.first_time)*24)*60,2) minutes from v$log_history a,v$log_history b where a.recid=b.recid+1 and b.first_time > sysdate - 1 order by a.first_time desc) test) y where y.rn < 30;

no rows selected

求回滚段正在处理的事务

SYS @ prod >select a.name,b.xacts,c.sid,c.serial#,d.sql_text from v$rollname a,v$rollstat b,v$session c,v$sqltext d,v$transaction e where a.usn=b.usn and b.usn=e.xidusn and c.taddr=e.addr and c.sql_address=d.address and c.sql_hash_value=d.hash_value order by a.name,c.sid,d.piece;

no rows selecte

求出无效的对象

SYS @ prod >select 'alter procedure '||object_name||' compile;' from dba_objects where status='INVALID' and owner='&owner' and object_type in ('PACKAGE','PACKAGE BODY','PROCEDURE');

Enter value for owner: SYS

old 1: select 'alter procedure '||object_name||' compile;' from dba_objects where status='INVALID' and owner='&owner' and object_type in ('PACKAGE','PACKAGE BODY','PROCEDURE')

new 1: select 'alter procedure '||object_name||' compile;' from dba_objects where status='INVALID' and owner='SYS' and object_type in ('PACKAGE','PACKAGE BODY','PROCEDURE')

'ALTERPROCEDURE'||OBJECT_NAME||'COMPILE;'

---------------------------------------------------------------------------------------------------------------------------------------------------------

alter procedure REMOVE_EMP compile;

求process/session的状态

SYS @ prod >select p.pid,p.spid,s.program,s.sid,s.serial# from v$process p,v$session s where s.paddr=p.addr;

PID SPID PROGRAM SID SERIAL#

---------- ------------ ------------------------------------------------ ---------- ----------

2 2908 oracle@cuug (PMON) 170 1

3 2910 oracle@cuug (PSP0) 169 1

4 2912 oracle@cuug (MMAN) 168 1

5 2914 oracle@cuug (DBW0) 167 1

6 2916 oracle@cuug (LGWR) 166 1

7 2918 oracle@cuug (CKPT) 165 1

8 2920 oracle@cuug (SMON) 160 1

9 2922 oracle@cuug (RECO) 164 1

10 2924 oracle@cuug (CJQ0) 163 1

11 2926 oracle@cuug (MMON) 162 1

12 2928 oracle@cuug (MMNL) 161 1

15 2934 sqlplus@cuug (TNS V1-V3) 159 3

16 2936 oracle@cuug (ARC0) 156 1

17 2938 oracle@cuug (ARC1) 155 1

18 3074 sqlplus@cuug (TNS V1-V3) 147 20

19 2942 oracle@cuug (QMNC) 152 7

20 2956 oracle@cuug (q000) 141 3

25 2958 oracle@cuug (q001) 148 2

求当前session的状态

求表的索引信息

SYS @ prod >select ui.table_name,ui.index_name from user_indexes ui,user_ind_columns uic where ui.table_name=uic.table_name and ui.index_name=uic.index_name and ui.table_name like '&table_name%' and uic.column_name='&column_name';

Enter value for table_name: CHILDEN

Enter value for column_name: DEPTNO

old 1: select ui.table_name,ui.index_name from user_indexes ui,user_ind_columns uic where ui.table_name=uic.table_name and ui.index_name=uic.index_name and ui.table_name like '&table_name%' and uic.column_name='&column_name'

new 1: select ui.table_name,ui.index_name from user_indexes ui,user_ind_columns uic where ui.table_name=uic.table_name and ui.index_name=uic.index_name and ui.table_name like 'CHILDEN%' and uic.column_name='DEPTNO'

TABLE_NAME INDEX_NAME

---------- ----------

CHILDEN IND_DEPTNO

显示表的外键信息

SYS @ prod >select table_name,constraint_name from user_constraints where constraint_type ='R' and constraint_name in (select constraint_name from user_cons_columns where column_name='&1');

Enter value for 1: DEPTNO

old 1: select table_name,constraint_name from user_constraints where constraint_type ='R' and constraint_name in (select constraint_name from user_cons_columns where column_name='&1')

new 1: select table_name,constraint_name from user_constraints where constraint_type ='R' and constraint_name in (select constraint_name from user_cons_columns where column_name='DEPTNO')

TABLE_NAME CONSTRAINT_NAME

---------- ------------------------------

CHILDEN FK_DEPTNO

显示表的分区及子分区(user_tab_subpartitions)

SYS @ prod >col table_name format a16

SYS @ prod >col partition_name format a16

SYS @ prod >col high_value format a81

SYS @ prod >select table_name,partition_name,HIGH_VALUE from user_tab_partitions where table_name='&table_name'

2 ;

Enter value for table_name: CHILDEN

old 1: select table_name,partition_name,HIGH_VALUE from user_tab_partitions where table_name='&table_name'

new 1: select table_name,partition_name,HIGH_VALUE from user_tab_partitions where table_name='CHILDEN'

no rows selected

使用dbms_xplan生成一个执行计划

SYS @ prod >explain plan set statement_id = '&sql_id' for &sql_text;

Enter value for sql_id: 062savj8zgzut

Enter value for sql: UPDATE sys.wri$_adv_parameters SET datatype = :1,value = :2, flags = :3, description = :4 WHERE task_id = :5 AND name = :6

old 1: explain plan set statement_id = '&sql_id' for &sql

new 1: explain plan set statement_id = '062savj8zgzut' for UPDATE sys.wri$_adv_parameters SET datatype = :1,value = :2, flags = :3, description = :4 WHERE task_id = :5 AND name = :6

Explained.

SYS @ prod >select * from table(dbms_xplan.display);

PLAN_TABLE_OUTPUT

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Plan hash value: 618325093

---------------------------------------------------------------------------------------------

| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |

---------------------------------------------------------------------------------------------

| 0 | UPDATE STATEMENT | | 1 | 2064 | 0 (0)| 00:00:01 |

| 1 | UPDATE | WRI$_ADV_PARAMETERS | | | | |

|* 2 | INDEX UNIQUE SCAN| WRI$_ADV_PARAMETERS_PK | 1 | 2064 | 0 (0)| 00:00:01 |

---------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):

---------------------------------------------------

2 - access("TASK_ID"=TO_NUMBER(:5) AND "NAME"=:6)

其中

sql_id 对应 v$sql里的 SQL_ID,

Sql_text 对应v$sql里的SQL_TEXT

SYS @ prod >select * from table(dbms_xplan.display);

PLAN_TABLE_OUTPUT

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Plan hash value: 618325093

---------------------------------------------------------------------------------------------

| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |

---------------------------------------------------------------------------------------------

| 0 | UPDATE STATEMENT | | 1 | 2064 | 0 (0)| 00:00:01 |

| 1 | UPDATE | WRI$_ADV_PARAMETERS | | | | |

|* 2 | INDEX UNIQUE SCAN| WRI$_ADV_PARAMETERS_PK | 1 | 2064 | 0 (0)| 00:00:01 |

---------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):

---------------------------------------------------

2 - access("TASK_ID"=TO_NUMBER(:5) AND "NAME"=:6)

14 rows selected.

求某个事务的重做信息(bytes)

SYS @ prod >select s.name,m.value from v$mystat m,v$statname s where m.statistic#=s.statistic# and s.name like '%redo size%';

NAME VALUE

-------------------------------------------------- ----------

redo size 11940

求cache中缓存超过其5%的对象

SYS @ prod >select o.owner,o.object_type,o.object_name,count(b.objd) from v$bh b,dba_objects o where b.objd = o.object_id and rownum <2 group by o.owner,o.object_type,o.object_name having count(b.objd) > (select to_number(value)*0.05 from v$parameter where name = 'db_block_buffers') ;

求谁阻塞了某个session(10g)

SYS @ prod > select sid, username, event, blocking_session, seconds_in_wait, wait_time from v$session where state in ('WAITING') and wait_class != 'Idle';

SID USERNAME EVENT BLOCKING_SESSION SECONDS_IN_WAIT WAIT_TIME

---------- ------------------------------ ---------------------------------------------------------------- ---------------- --------------- ----------

145 SYS enq: TM - contention 147 192 0

求session的OS进程ID

SYS @ prod >select p.spid "OS Thread", b.name "Name-User", s.program from v$process p, v$session s, v$bgprocess b where p.addr = s.paddr and p.addr = b.paddr UNION ALL select p.spid "OS Thread", s.username "Name-User", s.program from v$process p, v$session s where p.addr = s.paddr and s.username is not null;

OS Thread Name-User PROGRAM

------------ ------------------------------ ------------------------------------------------------

2934 PMON oracle@cuug (PMON)

2936 PSP0 oracle@cuug (PSP0)

2938 MMAN oracle@cuug (MMAN)

2940 DBW0 oracle@cuug (DBW0)

2942 LGWR oracle@cuug (LGWR)

2944 CKPT oracle@cuug (CKPT)

2946 SMON oracle@cuug (SMON)

2948 RECO oracle@cuug (RECO)

2950 CJQ0 oracle@cuug (CJQ0)

2952 MMON oracle@cuug (MMON)

2954 MMNL oracle@cuug (MMNL)

2962 ARC0 oracle@cuug (ARC0)

2964 ARC1 oracle@cuug (ARC1)

2966 ARC2 oracle@cuug (ARC2)

2968 QMNC oracle@cuug (QMNC)

2960 SYS sqlplus@cuug (TNS V1-V3)

查会话的阻塞

求DISK READ较多的SQL

SYS @ prod >select st.sql_text from v$sql sql1,v$sqltext st where sql1.address=st.address and sql1.hash_value=st.hash_value and sql1.disk_reads > 300;

求DISK SORT严重的SQL

SYS @ prod >select sess.username, sql.sql_text, sort1.blocks from v$session sess, v$sqlarea sql, v$sort_usage sort1 where sess.serial# = sort1.session_num and sort1.sqladdr = sql.address and sort1.sqlhash = sql.hash_value and sort1.blocks > 200;

求对象的创建代码

SYS @ prod >select dbms_metadata.get_ddl('TABLE','&1') from dual;

Enter value for 1: FATHER

old 1: select dbms_metadata.get_ddl('TABLE','&1') from dual

new 1: select dbms_metadata.get_ddl('TABLE','FATHER') from dual

DBMS_METADATA.GET_DDL('TABLE','FATHER')

--------------------------------------------------------------------------------

CREATE TABLE "SYS"."FATHER"

( "DEPTNO" NUMBER(2,0),

"DNAME" VARCHAR2(14

求表的索引

SYS @ prod >select a.index_name,a.column_name,b.status, b.index_type from user_ind_columns a,user_indexes b where a.index_name=b.index_name and a.table_name='&1';

Enter value for 1: CHILDEN

old 1: select a.index_name,a.column_name,b.status, b.index_type from user_ind_columns a,user_indexes b where a.index_name=b.index_name and a.table_name='&1'

new 1: select a.index_name,a.column_name,b.status, b.index_type from user_ind_columns a,user_indexes b where a.index_name=b.index_name and a.table_name='CHILDEN'

INDEX_NAME

------------------------------

COLUMN_NAME

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

STATUS INDEX_TYPE

-------- ---------------------------

IND_DEPTNO

DEPTNO

VALID NORMAL

索引中行数较多的

SYS @ prod >select index_name,blevel,num_rows,CLUSTERING_FACTOR,status from user_indexes where num_rows > 10000 and blevel > 0 ;

SYS @ prod >select table_name,index_name,blevel,num_rows,CLUSTERING_FACTOR,status from user_indexes where status <> 'VALID';

求表中有外键但是外键没索引的表

求有外键的表

SYS @ prod >select owner,constraint_name,constraint_type,table_name,r_owner,r_constraint_name,status from user_constraints where constraint_type='R' and table_name='CHILDEN';

OWNER CONSTRAINT_NAME CONSTRAINT_TYPE TABLE_NAME R_OWNER R_CONSTRAINT_NAME STATUS

----- -------------------- -------------------- ------------------------------ ------------------------------ ------------------------------ --------

SYS FK_DEPTNO R CHILDEN SYS PK_DEPTNO ENABLED

求外键定义在表的哪个字段

SYS @ prod >select owner,constraint_name,table_name,column_name from user_cons_columns where table_name='CHILDEN';

OWNER CONSTRAINT_NAME TABLE_NAME COLUMN_NAM

------------------------------------------------------------------------------------------------------

SYS FK_DEPTNO CHILDEN DEPTNO

求未定义索引的表

SYS @ prod >select table_name from user_tables where table_name not in (select table_name from user_ind_columns);

TABLE_NAME

------------------------------

FET$

SEG$

UET$

TSQ$

SYS @ prod >select * from user_ind_columns where table_name='CHILDEN' and column_name='DEPTNO';

INDEX_NAME TABLE_NAME COLUMN_NAM COLUMN_POSITION COLUMN_LENGTH CHAR_LENGTH DESC

------------------------------ ------------------------------ ---------- --------------- ------------- ----------- ----

IND_DEPTNO CHILDEN DEPTNO 1 22 0 ASC

查看用户使用内存情况

SYS @ prod >select username, sum(sharable_mem)/1024/1024 "SIZE:M", sum(persistent_mem)/1024/1024 "SIZE:M", sum(runtime_mem)/1024/1024 "SIZE:M" from sys.v_$sqlarea a, dba_users b where a.parsing_user_id = b.user_id group by username;

USERNAME SIZE:M SIZE:M SIZE:M

------------------------------ ---------- ---------- ----------

EXFSYS .040836334 .014293671 .012340546

SYS 3.79944134 3.11385727 2.83478165